<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .wrapper {
      width: 50vw;
      height: 500px;
      border: 1px solid black;
      display: grid;
      grid-template-columns: 200px auto;
    }
    .left {
      background-color: red;
      height: 100px;
      
      
    }
    .right {
      height: 400px;
      background-color: green;
    }

  </style>
</head>
<body>
  <div class="wrapper">
    <div class="left"></div>
    <div class="right"></div>
  </div
</body>
</html>